cs89712 Cirrus Logic, Inc., cs89712 Datasheet - Page 50

• Manufacturer Part Number: cs89712
• Description: High-performance, Low-power System-on-chip With 10base-t Ethernet Controller
• Manufacturer: Cirrus Logic, Inc.

50
Ready and Not
in Backoff?
Yes
3.2 s
Frame
Wait
Tx
Figure 14. Two-Part Deferral
No
Yes
Yes
Start Monitoring
Network Activity
Yes
Start IPG
No
Transmit
Network
Network
Network
Timer =
Active?
6.4 s?
Active?
Active?
No
No
Frame
Timer
IPG
No
Yes
frame is pending and if the MAC is not in Backoff,
transmission begins the 9.6 µs IPG). If no transmit
packet is pending, the MAC continues to monitor
the network. If activity is detected before a transmit
frame is ready, the MAC defers to the transmitting
station and resumes monitoring the network.
ure 15
2.26.5.4 Collision Resolution
If a collision is detected while the Ethernet port is
transmitting, the MAC responds in one of three
ways depending on whether it is a normal collision
(within the first 512 bits of transmission) or a late
collision (after the first 512 bits of transmission):
Ready and Not
diagrams the simple deferral process.
in Backoff?
Yes
Fra m e
Tx
Figure 15. Simple Deferral
Yes
Start Monitoring
Network Activity
No
No
Network
Active?
9.6 s
Wait
Transmit
No
Frame
Network
Active?
Yes
CS89712
DS502PP2
Fig-